First, colour in a piece of paper with Pentel Oil Pastels. You can draw any pattern you like, just make sure you colour it in thoroughly, so that you can't see any white bits.

Tada!

Get your Weterase SMW56-A ready... (link to the pen under the 'What you will need' section)

Your pen will look like this when you first open it. Don't worry, it's meant to be white first.

Get a paper towel or a fold up a tissue, and press the tip of the pen firmly onto it. You'll have to be patient for this, it can take a while.

Now the pen's ready to use!

Start painting over the coloured in bits. Make sure you don't press too hard on the paper. You can press down the nib of the pen to get more ink flow. You can also try other colours if you like! (white, for example)

Now you have to wait for it to dry...

When it's all dried, it should look matte, and no more shiny bits.

Get a wooden skewer, a toothpick, or a paper clip. Anything to scratch the paper with!

Start scratching!

Butterfly!

If you mess up, don't worry. You can go over it with your Weterase pen and let it dry, then start over!